/*============================================================================
  KWSys - Kitware System Library
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/

#include "Encoding.hxx"
#include "Encoding.h"
#include <vector>
#include <string>
#include <stdlib.h>
#include <string.h>

#ifdef _MSC_VER
#pragma warning(disable : 4786)
#endif

// Windows API.
#if defined(_WIN32)
#include <windows.h>
#endif

namespace cmsys {

Encoding::CommandLineArguments
Encoding::CommandLineArguments::Main(int argc, char const *const *argv) {
#ifdef _WIN32
  (void)argc;
  (void)argv;

  int ac;
  LPWSTR *w_av = CommandLineToArgvW(GetCommandLineW(), &ac);

  std::vector<std::string> av1(ac);
  std::vector<char const *> av2(ac);
  for (int i = 0; i < ac; i++) {
    av1[i] = ToNarrow(w_av[i]);
    av2[i] = av1[i].c_str();
  }
  LocalFree(w_av);
  return CommandLineArguments(ac, &av2[0]);
#else
  return CommandLineArguments(argc, argv);
#endif
}

Encoding::CommandLineArguments::CommandLineArguments(int ac,
                                                     char const *const *av) {
  this->argv_.resize(ac + 1);
  for (int i = 0; i < ac; i++) {
    this->argv_[i] = strdup(av[i]);
  }
  this->argv_[ac] = 0;
}

Encoding::CommandLineArguments::CommandLineArguments(int ac,
                                                     wchar_t const *const *av) {
  this->argv_.resize(ac + 1);
  for (int i = 0; i < ac; i++) {
    this->argv_[i] = kwsysEncoding_DupToNarrow(av[i]);
  }
  this->argv_[ac] = 0;
}

Encoding::CommandLineArguments::~CommandLineArguments() {
  for (size_t i = 0; i < this->argv_.size(); i++) {
    free(argv_[i]);
  }
}

Encoding::CommandLineArguments::CommandLineArguments(
    const CommandLineArguments &other) {
  this->argv_.resize(other.argv_.size());
  for (size_t i = 0; i < this->argv_.size(); i++) {
    this->argv_[i] = other.argv_[i] ? strdup(other.argv_[i]) : 0;
  }
}

Encoding::CommandLineArguments &Encoding::CommandLineArguments::
operator=(const CommandLineArguments &other) {
  if (this != &other) {
    size_t i;
    for (i = 0; i < this->argv_.size(); i++) {
      free(this->argv_[i]);
    }

    this->argv_.resize(other.argv_.size());
    for (i = 0; i < this->argv_.size(); i++) {
      this->argv_[i] = other.argv_[i] ? strdup(other.argv_[i]) : 0;
    }
  }

  return *this;
}

int Encoding::CommandLineArguments::argc() const {
  return static_cast<int>(this->argv_.size() - 1);
}

char const *const *Encoding::CommandLineArguments::argv() const {
  return &this->argv_[0];
}

std::wstring Encoding::ToWide(const std::string &str) {
  return ToWide(str.c_str());
}

std::string Encoding::ToNarrow(const std::wstring &str) {
  return ToNarrow(str.c_str());
}

std::wstring Encoding::ToWide(const char *cstr) {
  std::wstring wstr;
  size_t length = kwsysEncoding_mbstowcs(0, cstr, 0) + 1;
  if (length > 0) {
    std::vector<wchar_t> wchars(length);
    if (kwsysEncoding_mbstowcs(&wchars[0], cstr, length) > 0) {
      wstr = &wchars[0];
    }
  }
  return wstr;
}

std::string Encoding::ToNarrow(const wchar_t *wcstr) {
  std::string str;
  size_t length = kwsysEncoding_wcstombs(0, wcstr, 0) + 1;
  if (length > 0) {
    std::vector<char> chars(length);
    if (kwsysEncoding_wcstombs(&chars[0], wcstr, length) > 0) {
      str = &chars[0];
    }
  }
  return str;
}

} // namespace KWSYS_NAMESPACE
